Long Covid sufferers can feel symptoms for weeks or months and two women have shared the strange signs they experienced after catching the virus.
The NHS says the condition can lead to nausea, rashes and pink eye.
It appears that in the past few months, particularly when infection rates reached record high levels due to the Omicron variant, more people have been hit with longer and more unusual periods of coronavirus.
Chiara Rinaldi, 38, said in the days before she tested positive for Covid, she felt deeply fatigued and in a "state of otherworldliness" due to her brain fog, Wales Online reported.
Six weeks on, she feels there are days when she feels "back to square one".
Another person with Long Covid, Carolyn Hitt, described feeling sore gums weeks after being infected.
Half of people with Long Covid experience fatigue whilst a third are affected by shortness of breath, according to the latest report from the Office for National Statistics (ONS).
The following most common symptoms reported are the loss of smell (28 percent) and muscle ache (24 percent).
The most recent ONS figures estimate 1.7 million British people were experiencing Long Covid as of early March - about 2.7 percent of the population.
When it came to Chiara, she was so exhausted before she was diagnosed that she wondered whether she'd make it home after the school drop-off.
"Everything seemed a major effort. A week in I had a migraine, so I blamed that, but days after it hadn't gone away. Convinced my symptoms were something more physical, I went to the GP," explained the WalesOnline editor and mum-of-two.
"It was hard to put into words how I was feeling - I had a weakness on one side of my body that would come and go, dizzy spells and brain fog that left me unable to remember that I started making a cup of tea."
She continued: "I thought maybe it was a deficiency or perhaps anaemia, but the GP found a water infection. The next day I woke up with chest pains and ended up in hospital for tests but it was all clear and put down to costochondritis, when you get sharp pain from inflammation of the sternum - common after an infection."
Despite taking a course of antibiotics, Chiara said nothing had improved, although her chest pain had gone.
Then she finally tested positive for Covid and felt "vindicated".
"It was a massive relief to know why I felt terrible. I then developed the more common symptoms like a cough and a sore throat," she added.
This was not the end of her symptoms.
A week later, Chiara spent the night vomiting, and more than six weeks on, she still has a mild cough and cannot shake the exhaustion.
"There are days when I feel like I'm getting better, then others when I feel back to square one with brain fog and exhaustion," she said.
"I went to a children's party and ended up asleep in bed for the afternoon. It feels worse just before lunchtime, I suspect when my body is craving food.
"At lunchtime meetings I find it really hard to get my words out and to concentrate on what's been said. I have other friends, mostly female and in their 30s and 40s who are experiencing similar things. I hear lots that rest is the best cure."
Meanwhile journalist, broadcaster and author Carolyn Hitt said when she was first struck down with Covid she had many of the telltale signs including flu-like symptoms, a sore throat and general achiness.
However, a fortnight later, she began experiencing stranger symptoms including terrible earache.
"It's like when you've been on a flight and your ears won't pop. It's that kind of feeling of having pressure in the head. I've had sore eyes as well, a bit like conjunctivitis," she explained.
"Everything from the neck up has felt inflamed - even my gums felt sore which was a strange one. My brother had it at the same time and he had very similar symptoms."
Carolyn, who had managed to escape catching coronavirus until last month, said her range of symptoms made her feel "washed out".
She added: "For quite a few days I just needed to nap in the afternoon. It's like I'd gone back to being in nursery as I needed a lie down in the middle of the day. But there was nothing on my chest at all which is great. Maybe the vaccine stopped [the virus] from reaching there."
After posting a status on her personal Facebook page about her experiences, her friends said they had experienced similar issues.
One person stated: "I had it a few weeks ago, it was definitely mild but have been needing naps since then".
Another stated: "Yes, very tired. Also brain fog. Comes and goes. Seems to be getting better now."
Carolyn, who didn't have a dry cough or a high temperature when she tested positive, said she was "surprised" she felt so unwell but is now finally returning to her normal self.
"I felt rotten and I was quite worried in the aftermath that I felt so tired all the time. I was concerned about how long it would go on for. I was dragging myself around the day. I have seen Covid much more in my immediate circle than ever before."
A spokesman said the NHS trust was not currently observing an increase in severe illness or hospitalisations thanks to the successful vaccination programme.
He said: "Covid can sometimes manifest itself with a broad range of non-specific symptoms. However, the main symptoms to look out for are a high temperature, a new continuous cough, a loss or change to your sense of smell or taste, shortness of breath, feeling tired or exhausted, an aching body, headache, sore throat, blocked or runny nose, loss of appetite, diarrhoea, or feeling or being sick.
"The continued circulation of coronavirus across Wales is likely as a result of increased mixing following the easement of restrictions and is to be expected as we move out of the pandemic and into Covid-19 being an endemic disease.
"The best thing you can do to protect yourself, your family and community is to take up the offer of a coronavirus vaccine. You can also protect yourself and others by maintaining a social distance where possible, washing hands regularly and ensuring there is adequate fresh air ventilation when meeting indoors.
"If you develop any of the common symptoms listed above, you should self-isolate immediately to protect others and request a coronavirus test."
